Cartain materials such as turpentine oil, unsaturated organic compound, phosophorus, metals such as `Zn`, and `Pb`, etc., can absorb `O_(2)` from air in the presence of `H_(2)O`, which is converted to absorb `O_(2)` from air in the presence of `H_(2)O`, which is converted to `H_(2)O_(2)`. This is called autoxidation. Intermolecular redox reactions are those in which one molecule is oxidised and the other is reduced. Intramolecular redox reactions are those in which oen atom of a molecule is oxidised and the other atom is reduced.
Which of the following reactions is`//`are auto redox or induced oxidation reaction `(s)`

Explanation

To determine which of the given reactions are autoredox or induced oxidation reactions, we will analyze the oxidation states of the elements involved in each reaction. Autoredox reactions are characterized by a single substance acting as both the oxidizing and reducing agent.

### Step-by-Step Solution:

1. **Identify the Reactions**:
We need to analyze the reactions provided in the question. Let's assume we have three reactions to consider.

2. **Assign Oxidation States**:
For each reactant and product in the reactions, assign oxidation states. This will help us identify which elements are oxidized and which are reduced.

- For example, in the reaction involving lead (Pb):
- Pb (in elemental form) has an oxidation state of 0.
- In PbO, Pb has an oxidation state of +2.
- In H2O, oxygen has an oxidation state of -2.
- In H2O2, oxygen has an oxidation state of -1.

3. **Determine Changes in Oxidation States**:
- For Pb:
- 0 (Pb) → +2 (in PbO) indicates oxidation (loss of electrons).
- For O:
- 0 (in O2) → -2 (in H2O) indicates reduction (gain of electrons).
- 0 (in O2) → -1 (in H2O2) also indicates reduction.

4. **Identify Autoredox Behavior**:
- Since the same element (O) is undergoing both oxidation and reduction in the presence of water, this indicates that the reaction is an autoredox reaction.
- Repeat this process for the other reactions provided in the question.

5. **Conclusion**:
- If all reactions show that one species is being oxidized while another is being reduced, we can conclude that they are all autoredox reactions.

### Final Answer:
All the reactions provided in the question are autoredox reactions.

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